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Upward transport of iron at the west shelf edge-slope of the Okinawa Trough in the East China Sea

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/75068

Title: Upward transport of iron at the west shelf edge-slope of the Okinawa Trough in the East China Sea
Authors: Sasayama, Ryohei Browse this author
Hioki, Nanako Browse this author
Morita, Yuichiroh Browse this author
Isoda, Yutaka Browse this author →KAKEN DB
Imai, Keiri Browse this author
Ooki, Atsushi Browse this author →KAKEN DB
Kuma, Kenshi Browse this author →KAKEN DB
Keywords: Iron supply
Chemical substances
Hydrographic data
Upwelling
Resuspension of sediments
Shelf break
Continental slope
Kuroshio
Okinawa Trough
East China Sea
Issue Date: Aug-2018
Publisher: Springer
Journal Title: Journal of oceanography
Volume: 74
Issue: 4
Start Page: 367
End Page: 379
Publisher DOI: 10.1007/s10872-018-0468-y
Abstract: We studied the behavior of chemical substances in the upper 300 m of the water column across the continental shelf-slope interface in the East China Sea off the Okinawa Trough. The behaviors of iron, inorganic nutrients, and humic-like fluorescent dissolved organic matter were strongly influenced by the extensive water exchange between the East China Sea and the Kuroshio Current across the shelf break and slope via upwelling and frontal processes. We attributed the high humic-like fluorescent intensity at the subsurface of the shelf break and slope regions to the lateral supply of humic-like fluorescent dissolved organic matter from the shelf sediments to the outer shelf region due to the intrusion of shelf water into Kuroshio subsurface water. We found that the behavior of iron at the continental shelf-slope was remarkably different from the conservative mixing of inorganic nutrients and humic-like fluorescent dissolved organic matter. In deep and bottom waters at the shelf-slope, high total iron concentrations, which were closely related to water transmittance, possibly resulted from the swept transport of iron-rich resuspended sediments over the shelf floor from the slope by the invading Kuroshio Intermediate Water close to the bottom.
Rights: The final publication is available at link.springer.com
Type: article (author version)
URI: http://hdl.handle.net/2115/75068
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 久万 健志

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